The Signature Meter is an grey-framed energy gauge with a star at the right end. The energy bar within it starts out as orange and gradually turns brighter as the meter increases. When full, the star then lights up yellow and pulses in size. When the Signature Move is being used, the star then spins in place as the meter depletes.
The Signature Meter's function is enabling the use of the playable character's Signature Move. The Signature Meter can be filled up by collecting Rings, performing Air/Speed Boosts, destroying enemies, or attacking rivals in gameplay. Once full, press to perform the Signature Move. While the move is used, the Signature Meter will deplete, and once it is completely empty, the Signature Move ends. However, the player can slow down the depletion rate slightly by repeatedly tapping while the Signature Move is being used.